Alkylaminoacetopyrocatechol and process of making same.



UNITED S'ITATES PATEN' OFFICE.

FRIEDRICH STOLZ, OF HOGilST-ON-TllE-MAiX, GERMANY, ASSlGNOR TO FARB\\'ERKE'; VORM. MEISTER LULHIS & BRI I XING. OF HOCHST-ON THE-MAIN, GERMANY. A L'URPQRATIOX OF GERMAXY.

.ALKYLA MINOAOETOPYROOATECHOL 15 to stand for a considerable time, or on gently adrenaline,

amin to salts, as shown hv Dzierzgowski.

907,) but thni on allowing the cl1loroaceto- Specification of Letters Patent.

AND PROCESS OF MAKING SAME.

Patented March 20, 1906.

Appligatig Angnst 31, Serial NO. 222 838- To all whom it may (mm-er.-

Be it known that I, FRIEDRICH SToLz, Ph. 1)., chemist, a citizen of the Empire of Germany, residing at Hochsbon-the-llain, Germany, have invented certain new and useful Improvements in the Manufacture of Alkylammoacetopyrocntecliol, of which the following is a specification.

' I have found that cllloi'o-acetopyrocntechol combines not onl with prinmr aliphatic (BulLd. la Soc. (,"ltim. 189i: \ol. Xllpage pyrocatcchol with an excess of the ainin heating both, an exchange of" the halogen atom for the nmtn 1(Slll.l( occurs. Thus alwhich are of great value in therapeutics, as their therapeutic eil'cct is similar to that of The are also administered in the same manner as the saicl prorluct.

The process may he carried out, for stanee, as follows.

Example: One part, by weight. of finelyulverized chloro-acetopyn icatechol oht a i nedi 3 the interaction of ChllilH-HL'CIlYl chloliil and pyrocntet-hol (J. Hus-s. P71 g s. t'itim. Ges. 2-5, 154) is :sus )entletl in the same quantity of alcohol, to winch is gradually ziililfltl one part, by weight. of an aqueous olution of sixtypcr cent. of nmnomcthylamin. 'lhe inethylamin salt of the chlorinated tlioxylietone isfirst f'DI'DiCll without any solution ocwjnring, Al ter some time, hut more ritpitlly when gently heated, a further reaction occurs. the salt lie-f ing transformed into ill? methylalninaceto pyrocatcclml. which separates as a crystalline precipitate. To complete the transformation, the whole is allowed to stand for some time. whereupon the separated protluc t is filtcrcrl and suliseqiiently \Vzlfilltil with alcohol. The compound may h:- pnrilietl by dissolving it in rlilutc hytlrocltloric zulil. zill l on care fully mltling ammonia small tra es of impurities are precipitated. further mlilition of white crystalline powder, very little soluble in water, alcohol, or ether. It decomposes when heated to 236 oentigrnde, assuming previousl n (lillli color. \Ylth hydrochloric ncitl it yields a salt readily soluble in water. it crystallizes from alcohol in colorless crystals. The aqueous solution, like pyrocate- 'cltol with ferric chlorid, yields an emeraldgreen coloration.

Like meth glaniin, other primary aliphatic amins. such as ethylaniin, may be combined with chloroacetopyrocatechol.

The properties of the com .ountls thus 0btainahle correspond with t use of methylaminacetopyroeatechol.

priniartx aliphatic amins '2 The process herein described for the manufacture of alkylnminoaeetop rocatechoi which consists in substituting for the haiogen of eliloronceto yrocatechol he radical of a primary alip iatio aniin by gently heating the chloroacetopyrocatechol with primary aliphatic amins.

3. As nmvprorlucts, the alkylaminoacetm pyrocatechols, being white crystalline (0111- pouruls. very little soluble in water, alcohol and ether, melting at a high temperature with decomposition, forming with hydrochloric acitl salts reatlil soluble in water, crystnllizing from alcohol, the aqueous solution of the salt yielding with ferric chlorid an emeraldgreen coloration: annnonia precipitating from the solution the aminoketone.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

V FRIEDRICH STOLZ Witnesses:

ALFRED Bmsnois, BEHXHAHU insxwmvmzn. 

